US President Donald Trump has signed an executive order to reinstate the 'foreign terrorist organisation' designation for Yemen's Huthi rebels. The move comes after President Joe Biden reversed the designation following Trump's departure. Biden's decision was influenced by concerns from humanitarian organisations about withdrawing from Yemen. However, the Huthis' recent attacks on vessels and their declaration of US and British interests as 'legitimate targets' prompted the Trump administration to restore the more stringent classification. The implementation of this order is expected to take several weeks.